Enable removal of a second disk even if that requires conversion of
metadata from raid1 to dup, but not when data would lose replication.
Signed-off-by: Alexandre Oliva <oliva@xxxxxxxxxxxxxxxxx>
---
fs/btrfs/volumes.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index c37433d..7b348c2 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1290,12 +1290,16 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
goto out;
}
- if ((all_avail & BTRFS_BLOCK_GROUP_RAID1) &&
+ if ((root->fs_info->avail_data_alloc_bits & BTRFS_BLOCK_GROUP_RAID1) &&
root->fs_info->fs_devices->num_devices <= 2) {
printk(KERN_ERR "btrfs: unable to go below two "
"devices on raid1\n");
ret = -EINVAL;
goto out;
+ } else if ((all_avail & BTRFS_BLOCK_GROUP_RAID1) &&
+ root->fs_info->fs_devices->num_devices <= 2) {
+ printk(KERN_ERR "btrfs: going below two devices "
+ "will switch metadata from raid1 to dup\n");
}
if (strcmp(device_path, "missing") == 0) {
--
1.7.4.4
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